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UPANIADS . The Upaniads are codified Sanskrit philosophical speculations of varying lengths in both prose and verse form, composed orally and set to memory mostly by anonymous South Asian sages, primarily in the classical and medieval periods. While the most important and influential Vedic Upaniads date from the eighth to the fourth centuries bce, some lesser-known sectarian Upaniads appear as late as the sixteenth century ce. Individually and as a whole, the Upaniads present insights and doctrines that serve as the foundation for much of India's philosophical thought.

Traditional South Asian teachings based on the Upaniads have been called the Vedānta, the "end of the Veda," for the Upaniads chronologically and formally set the closure of the Vedic canon. Perhaps more to the point, Upaniadic lessons are said to be the end of the Veda in that they purport to present the "hidden meaning" or the "real message" of religious practice and thought.

The central teaching presented by the Upaniads as a whole centers on the notion that behind all of the spatial swirl and temporal flux of the world as it is experienced by the senses is a subtle, pervasive, timeless, and unchanging reality that is identical to the undying essence of the human being as well. The early Vedic Upaniads call this unified and imperishable world soul brahman or ātman, the former applying more typically to the godhead and the latter signifying the correlative divine "self" residing at the deepest level of one's person. The theistic Upaniads teach that this brahman or ātman is a single deity known generically as Īśv Īśa (Lord) living deep within one's being and identified particularly as Śiva, Viu, or the Goddess by particular sectarian communities.

While they explicitly or implicitly admit the difficulties of comprehending a hidden reality that either transcends or simply cannot be known through the structures of time, space, and causation, the Upaniads hold that through disciplined practices of meditation and the cultivation of extraordinary knowledge, it can in fact be discerned. Such discernment releases one from the apparent cycles of life and death caused by one's ignorance of the fact that the essential self does not die. Thus, Upaniadic religious anthropologies, theologies, and soteriologies all revolve around a key lesson that appears ubiquitously but that might well be characterized by the Adhyātma Upaniad' s assertion that "he is a free person who through insight sees no distinction between his own self and brahman, and between brahman and the universe" and the Kaha Upaniad' s proclamation that, having comprehended this identity, "one is released from the jaws of death" (3.5).

The Upaniads were first put into written form in 1656 ce, when Sultan Dara Shakoh sponsored the translation of fifty Upaniads from Sanskrit into Persian. In 18011802, these Persian works were then translated into Latin by Antequil du Perron, becoming the first, although poor, European version. Since that time, all of the Upaniads have been rendered into various Indian scripts, and the more important or influential ones have been translated into virtually all of the world's major languages. The Upaniads stand as works of monumental significance in the history of India and of the world.

Connotations of the Term Upaniad

Built from the Sanskrit verbal root sad ("sit") and the prefixes upa- and ni- ("nearby"), the word upaniad represents the act of sitting at the feet of someone. The pedagogical tradition in which a student in search of sacred knowledge sat on the ground in front of a guru typifies, in part, the practices of the Vedic vānaprastha s ("forest dwellers") and sanyāsin s ("renun-ciants") who had retired to forest retreats to meditate and study. The practice also appears in various Agamic and Tantric traditions, many of whose followers lived beyond the boundaries of settled civilization, where they practiced yogic meditation under the guidance of a guru. Through combinations of dialogues, monologues, questions and answers, riddles, and speculative discourses, the student privately heard from the teacher secret lessons that had been passed down through the generations of the sacred lineage. Such a "secret lesson" was an upaniad. Isolated as a textual genre, the collections of such secret teachings are known as the Upaniads.

The term upaniad thus connotes an element of esotericism. In fact, the Upaniads state explicitly that such lessons are not intended for the general population: "Let none who has not maintained the vow think on this," demands Muaka Upaniad (3.12.11), and the Rāmapūrvatāpanīya Upaniad warns the teacher to "give not [his lessons] to common people" (84). That the teachings were to be heard by only select ears is demonstrated by the texts themselves, for synonyms and appositions of the word upaniad include not only such terms as satyasya satyam ("the truth of truth," Bhad. Up. 2.1.20), but also rahasyam ("that which is hidden," Nsimhottaratāpanīya Up. 8) and paramam guhyam ("that which is a supreme secret," Kah. Up. 3.17).

The esoteric tone of the Upaniadic teachings derives in part from the place they hold in the larger Vedic literary corpus. The earliest Vedic literatures are the inspired hymns, chants, and incantations of the gveda, Sāmaveda, Yajurveda, and Atharvaveda, which were composed by the visionaries and priests of the various Vedic traditions and codified around 1200 bce (although some are earlier and some later). To these Sahitās ("collections") of poems and songs are attached ritual instructions known as the Brāhmaas, which date to roughly 1000 to 800 bce. As early as the ninth century bce, individuals and small groups of people, most often of the katriya (warrior) rather than the brāhmaa (priestly) class of society (see Bhad. Up. 1.4.11), began to leave the villages to live and meditate in the forest. There, unable or unwilling to perform the sometimes elaborate and expensive Vedic religious ceremonies, they contemplated the allegorical rather than literal significance of the hymns and rituals. These allegorical interpretations formed the basis of texts known as the rayakas, or "forest books." Toward the early part of the eighth century bce these contemplative sages began to formulate more abstract philosophical interpretations of the metaphors and homologies used in the Brāhmaas and rayakas as they sought to gain knowledge of the deeper ontological status of the world and of the place the human being holds in that world. Out of this context came the Upaniads, the non-sacerdotal philosophical musings on the nature of reality itself.

The composers of the Upaniads diverged from the religious tradition of their time in that, unlike earlier Vedic poets and visionaries, they found little interest in proclaiming the wonder of the objective world or in praising the gods said to have enlivened that world. The forest sages understood the outer world to be less significant than the inner, and the gods to be nothing more than reflections or expressions of subjective processes within one's own being. "All of the gods are within me," asserts an early forest work, the Jaiminīya Upaniad Brāhmaa (1.14.2). The Kaivalya Upaniad, a later text, teaches that "the highest brahman, which is all forms, which is the supreme reality of the universe, which is the most subtle of the subtle and which is eternal, is nothing but yourself." The Upaniadic stress on the inner world rather than on external religious practices similarly distinguished the forest sages from the composers of such ritual texts as the Brāhmaas and, later, the Kalpasūtras; for the forest sage had no need for "ritual baths, nor periodic rites, nor deity, nor location, nor sacred space, nor worship" (Tejobindu Up. 4).

The lines separating the Brāhmaas and the rayakas, and the rayakas and Upaniads, as textual genres are not distinct; the early rayakas resemble in form the later Brāhmaas, and the later rayakas are nearly indistinguishable from the early Upaniads. Some traditions hold that the first true Upaniad is the gveda's Aitareya rayaka (ninth century bce), while most others mark that line with the emergence of the Śukla ("White") Yajurveda 's Bhadārayaka Upaniad and the Sāmaveda 's Chāndogya Upaniad, both of which date to the eighth century bce.

Upaniadic Teachings

Symbolic representations in the Upaniads of ultimate reality are consistent with the notion that such reality is unmanifest yet vital. Brahman (ātman, Īśvara, etc.) is described as life-giving breath (prāa ), wind (vāyu ), or empty space (ākāśa ); as pure consciousness (cit ), bliss (ānanda ), or eternity (ananta ); and as the infinite subject by whom all objects are known, the "inner guide" (antaryāmin ) of all that is.

Given its acknowledged immanent yet transcendent nature, ontological discourses in the early Vedic Upaniads depict brahman both cosmically (sagua, "with characteristics") and acosmically (nirgua, "without characteristics"). Sagua brahman is understood to be the finest essence (aimā, rasa, etc.) of all things in the world, as honey is the essence of beeswax and oil is the essence of sesame seeds (see Ch. Up. 6.9ff.). Understood cosmically, therefore, brahman is the substance of the universe. This does not mean that brahman is the material stuff of the world that can be perceived sensually. Rather, it is the hidden and subtle reality that allows all things to exist in the first place. Thus, when the sages of the Muaka Upaniad note that "this whole world is brahman " and that brahman is the "hidden mover within all that moves, breathes, and winks" (2.2.12), they imply the cosmic ontological notion that brahman is the very "beingness" of all beings, including the human being. Transformative insight allows one to understand that this cosmic substratum is unified and indivisible, oras the Chāndogya Upaniad 's Uddālaka rui teaches his son, Śvetaketu"Thou art That!" (

Understood acosmically, brahman cannot be described through definitive or positive statements, because brahman transcends the limitations of language. Thus, nirgua brahman is not subject to categorization, and therefore, can neither be perceived nor conceived. Brahman "cannot be heard, nor touched. It has no form [and] is imperishable. Similarly, it has no flavor, nor odor. It is eternal, without beginning [and] without end" (Kah. Up. 3.5), and it "cannot be known through language, nor by the mind, nor by sight" (6.12). That the content of ultimate reality cannot be depicted is summarized most succinctly in the Bhadārayaka Upaniad 's recurring assertion that "the self [ātman ] is not this, not that" (4.4.22ff.).

Thus, while the Upaniadic student seeking knowledge of sugua brahman was to comprehend the unity of all things in a world constructed on the essence of brahman, the student who looked for an understanding of nirgua brahman was to "deconstruct" the phenomenal world, as it were, in order to comprehend the imperishable self that lies behind the world of life and death.

Whether they considered brahman to be cosmic or acosmic, Upaniadic teachers generally distrusted empirical knowledge gained through sensual experiences. According to these thinkers, the physical world is a "measured" or "constructed" world, the world of māyā, a term that in the Upaniads denotes those aspects of the world that are empirically perceived but not ultimately real. Māyā, in other words, characterizes the world of time, space, and causation. According to Upaniadic teachings, then, that world which the ignorant call the "real world" is not, in truth, real.

Upaniadic ontologies are thus closely linked with epistemology. They are similarly related to physiology and psychology. Drawing on Sākhya metaphysics, the Upaniads generally recognize a dualism of matter (prakti ) and spirit (purua ). The former constitutes the objective and phenomenal world. The latter comprises the knowing subject that has no temporal or spatial limitations, and at times is used as a synonym for ātman. Within the world of prakti, the human body and mind may be divided into the gross body (sthūla-śarīra ) and the subtle body (sukma- or liga-śarīra ). Everyday consciousness revolves around the gross body made up of the senses and the objects of those senses (known collectively as the indriya s). Sensations gained from the gross body are then categorized by the subtle body, which consists of the mind (manas ), the mechanism of personal identity or "ego" (ahakāra ), and the "awareness" (buddhi or antakāraa ), the basis of one's ability to live and act in the world.

Upaniadic physiology declares that both the gross and subtle bodies, however, are phenomenal (and therefore unreal) constructions relative to the spirit, the true self (see Kah. Up. 3.1011). Thus, the farther one's awareness is removed from its attachment to the external world experienced by the gross and subtle bodies, the closer one comes to a full yet nonempirical experience of the true self. Accordingly, the Upaniads emphasize the importance of dream states in the comprehension of deeper realities (see, e.g., Bhad. Up. 4.3.9). In sleep one loses awareness of the outside world, a world that is in effect a bad dream to begin with. The deeper one sleeps, the closer to eternal reality one gets.

The Upaniads recognize four states of waking and dreaming awareness, each successively purer and closer to the direct comprehension of ātman. The grossest psychological level is that of waking consciousness, a level in which apparent objects are mistakenly understood to be distinct entities and in which the subject does not recognize itself. The second, more refined, level of awareness is that of active dreaming, a state in which objects lose their solidity and appear more as they really areas changing and unreal events. The dreaming subject is a "creator" (kart ) of the world, which exists only because he "projects" (sjate ) it (see Brhd. Up. 4.3.10). The third level is that of dreamless sleep (samprasāda, suupti ), in which one loses all awareness of oneself as an object in relation to other objects and no longer experiences the constrictions of time and space. In dreamless sleep one is said to have gained complete tranquillity. Here, one momentarily enjoys complete reunion with brahman and experiences, albeit nonempirically, the highest bliss (paramānanda; see Bhad. Up. 4.3.32).

Later Upaniads, especially those influenced by the practices and ideologies of Yoga, add to these states another level to one's psychological being, known simply as turīya or turya, "the fourth." Maukya Upaniad 7 describes this state: "It is not cognitive, nor is it noncognitive. It is unseen, unable to be spoken of, ungraspable, without any distinguishing characteristics, unthinkable, unnameable. It is the essence of the knowledge of the One Self [ekātma-pratyaya-sāram ], that into which the world resolves. It is peaceful and benign. It is indivisible." Such a state sounds like the Upaniadic notion of ultimate reality. Indeed, the passage continues: "It [turīya ] is ātman. It is to be known."

The waking somatic body, therefore, is unreal relative to ultimate reality, a point that carries ethical and eschatological implications. The "self" of one's being leaves the body at death, as the mango fruit at maturity separates from its stalk (see Bhad. Up. 4.3.36). If one has not renounced one's attachment to the world of the senses, then one will be reborn in another physical body, the existential situations of which are determined by the ethical laws of karman; and sooner or later one will suffer and die again. This continually turning wheel of death and rebirth (sasāra ) is understood to be a painful trap from which one is released only when one understands that the physical body is not the real self, and that the world which the senses perceive is an insubstantial and effervescent illusion.

Most of the Upaniads agree that the best way one would cultivate such a freeing insight would be through the rigors of yogic meditation. While the Vedic Upaniads as a whole reflect the influence of yogic practice and ideology (see, for example, Maitri Up. 6.1930 or Śvet. Up. 2.810), it is in the Yoga Upaniads that such teachings are most fully presented. For example, the Amtabindhu, Śāilya, and Yogatattva Upaniads, among others, contain long passages on the eight "branches" (aānga ) of yogic practice (discipline, self-restraint, correct body posture, breath control, suppression of sensory awareness, mental concentration, intuitive meditation, and final union with the Absolute), the proper means to master each, and the characteristics of the successive levels of yogic "powers" (siddhi s) one gains as one becomes more adept at the particular practices.

While continuing to uphold the efficacy of yogic practice, some of the Upaniads also present the more theistic teaching that one cannot truly know one's soul without what might be termed the "grace" of the soul. Such appears to be the position of Kaha Upaniad 2.23, which maintains that "this soul [ātman ] cannot be attained through instruction, nor through rational thinking, nor by great learning. He is to be attained only by the one whom [the supreme self] chooses. The soul [ātman ] reveals his own nature to such a one." The soteriological dimensions of this theistic teaching are much more explicit in the Śvetāśvatara Upaniad 's statement that "more subtle than the subtle, greater than the great, is the soul [ātman ] that is set within the heart of the creature. One beholds it to be actionless and becomes free of sorrow, when through the grace of the Creator [dhātu prasadāt ] he sees the Lord [Īś ] and his greatness" (3.20).

Classification of the Upaniads

It is somewhat problematic to arrive at a precise number of Upaniads, because if all Sanskrit works claiming to present secret teachings were to be classified as Upaniads the number would be indefinite. Nearly 250 texts call themselves Upaniadsincluding the Allopaniad ("secret teachings about Allāh," composed at the time of Akbar) and the Christopaniad, dated well after the rise of Christian communities on the subcontinentbut it appears that most of these do so merely as a way to align themselves with a respected literary genre or religious tradition.

The Muktika Upaniad and other medieval South Indian works mention 108 separate Upaniads in an enumeration that has become somewhat of a stock list. Using the methods of historical, thematic, and textual criticism, twentieth-century scholars have isolated 123 genuine Upaniads. These works may be classified into two general categories, the Vedic Upaniads and the later Upaniads.

The Vedic Upaniads

Virtually all Vedic and most sectarian traditions recognize ten to eighteen Upaniads as revealed authoritative scripture (śrūti). Furthermore, all of the more important traditional theologians and philosophers throughout classical and medieval India recognized the central importance of these ancient works, and have written extensive commentaries on them. For these reasons, the Vedic Upaniads have also been called the Major, or Principal, Upaniads. They may be divided into three historical and textual groups.


The earliest Upaniads (the Bhadārayaka, Chāndogya, Taittīriya, Aitareya, and Kauītaki Upaniads and the prose parts of the Kena Upaniad ) predate the rise of Buddhism in the sixth century bce, the Bhadārayaka and the Chāndogya being the earliest and the Kena being the latest. All are explicitly aligned with one or another of the various sakhā s, or "schools" of Vedic interpretation, and are composed in a prose that closely resembles Vedic Sanskrit. These texts make frequent use of allegorical modes of interpretation and are often almost indistinguishable in style from the rayakas. In many ways these six works serve as the philosophical foundation for all of the later Upaniads.


A second group of Upaniads (the Kaha [or Kahakā ], Īśa, Śvetāśvatara, Muaka, and Mahānārāyaa Upaniads and the metrical parts of the Kena Upaniad ) reflects a growing sectarian orientation and dates to the sixth and fifth centuries bce. These works, which are composed primarily in verse, are only loosely attached to the Vedic sakhā s, and make less use of metaphorical, allegorical, or other tropic means of expression.


The Upaniads of a third group (the Praśna, Maitri [or Maitrāyaīya ], Jābāla, Paigala, and Māūkya Upaniads) return to prose form, but in a language that resembles classical Sanskrit much more than Vedic Sanskrit. They probably emerged in the late fifth and early fourth centuries bce although the dates for a few of them are uncertain.

All of these works are attached to the textual collections of specific priestly Vedic traditions. The Aitareya and Kauītaki Upaniads belong to the gveda. The Kaha, Maitri, Taittrīya, and Śvetāśvatara Upaniads are attached to the Ka ("Black") Yajurveda, while the Bhadārayaka Īśa, and Paigala Upaniads are aligned with the Śukla ("White") Yajurveda. The Chāndogya and Kena Upaniads belong to the Sāmaveda, and, finally, the Muaka, Māūkya, Praśna, and Jābāla Upaniads form a part of the conclusion of the Atharvaveda.

The later Upaniads

To this list of principal Vedic Upaniads most authorities would add a large number of less known and, for the most part, medieval works that may be classified as the later Upaniads. These works are not universally accepted as śrūti, and they have not received the extensive attention from traditional South Asian philosophical commentators as have the Vedic Upaniads. This does not mean that they are less important than others. Indeed, these texts may well be more influential in their respective communities than the principal Vedic Upaniads. Such works reflect the increasing influence of Sākhya philosophy, Yoga practice and ideology, and sectarian theistic traditions through the classical and medieval periods. While many align themselves with the gveda, Yajurveda, or Sāmaveda, most of these Upaniads are attached, at least nominally, to the Atharvaveda. Most are in prose form and are composed almost entirely in classical Sanskrit.

The number of the later Upaniads is too large to list all of them here. Only the most important or representative ones will be mentioned; readers seeking a more complete list are directed to the bibliography.


Vedānta Upaniads. These works, which include the Muktika, Pia, Garba, Ātman, Prāāgnihotra, Adhyatman, and Brahmā as well as perhaps two dozen other Upaniads, fairly consistently maintain the general doctrines presented by the Vedic Upaniads, and show relatively little sectarian influence. They differ from the Vedic Upaniads only in that they are not cited in traditional commentaries.


Yoga Upaniads. These texts arose out of a more specifically ascetic context than did many of the Vedic and Vedānta Upaniads, and reflect the influence of Yoga ideologies and practices within Upaniadic circles. This group includes the Yogakualī, Nādabindhu, Śāndilya, Yogatattva, Tejobindhu, Hasa, Amtabindhu, Dhyānabindhu, and Varāha Upaniads. These works center on the direct experience of the eternal self (ātman ) through specific techniques of Yoga and through the meditation on the sacred syllable om.


Sanyāsa Upaniads. These works tend to extol the life of the wandering ascetic's search for release from the cycle of rebirth (sasāra ) and teach ways in which such release may be obtained. They include the Nāradaparivrājaka, Bhikuka, Paramahasa, śrama, and Sanyāsa Upaniads.


Mantra Upaniads. These teachings center on esoteric interpretations of specific sounds and syllables and place those interpretations into Yogic as well as Śaiva, Vaiava, and Durgā theistic contexts. Typical of such works would be the Tārasāra, Kalisantāraa, and Nārāyaa Upaniads.


Śaiva Upaniads. The earliest Śaiva Upaniad might well be said to be the Vedic Śvetāśvatara Upaniad, which praised the role of Rudra (a Vedic precursor to the god Śiva) in the religious quest. The more well-known of the medieval Śaiva Upaniads would include the Nīlarudra, Kālāgnirudra, Kaivalya, and Atharvaśiras Upaniads, all of which understand the person of Śiva (also known as Maheśvara, Bhairava, Īśana, and other names) to be an embodiment of the deepest self, ātman.


Vaiava Upaniads. These texts tend to interpret the various incarnations of the god Viu as representative forms of the ātman. Some Vaiava traditions look to the Īśa Upaniad as the Vedic antecedent to, or oldest sectarian representative of, this particular genre. Works associated with this group include the Nsimha-pūrvatāpanīya, Nsimhot-taratāpanīya, Mahā, Rāmapur-vatāpanīya, and Ramottara-tāpanīya Upaniads.

See Also

Brahman; Māyā; Samādhi; Sanyāsa; Soul, article on Indian Concepts; Vedānta; Yoga.


Readers seeking a stock list of what have been termed Vedic and later Upaniads should turn to the opening lines of the Muktika Upaniad, which lists 108 such works. J. N. Farquhar, a historian of Indian religious literatures, has distinguished 123 distinct Upaniads, which he lists in his An Outline of the Religious Literature of India (1920; reprint, Delhi, 1967), p. 364.

The last hundred years have seen the publication of a large number of Upaniads in modern languages, many of which suffer from a lack of perspicuity due to the somewhat esoteric nature of the original works. The most objective English translation of most of the Vedic Upaniads remains Robert Ernest Hume's somewhat stilted The Thirteen Principal Upanishads, 2d rev. ed. (Oxford, 1949). A more fluid translation is Sarvepalli Radhakrishnan's The Principal Upaniads (New York, 1953). Radhakrishnan's work is better than Hume's in that it includes the Sanskrit and it translates sixteen rather than thirteen works. Some students will find Radhakrishnan's commentaries on the works to be of some help, although many of them reflect his neo-Vedantic bias. Another good translation, and one that openly admits an Advaitic point of view, is Swāmī Nikhilānanda's The Upanishads, 4 vols. (New York, 19491959). Readers interested in the later Upaniads would be advised to look to Paul Deussen's Sechzig Upanishads des Veda (Leipzig, 1897), to K. Nārāyanasvāmi Aiyar's Thirty Minor Upanishads (Madras, 1914), and to Jean Varenne's Upanishads du yoga (Paris, 1974). Readers seeking only selections from the Vedic Upaniads might turn to Sarvepalli Radhakrishnan and Charles Moore's edited volume, A Source Book in Indian Philosophy (Princeton, N.J., 1957), pp. 3796, or to Juan Mascaró's The Upanishads (Baltimore, 1965), although the latter is somewhat colored by a theistic understanding of the texts.

Those readers interested in short introductions to Upaniadic thought are advised to consult Paul Deussen's The Philosophy of the Upanishads (1906), 2d ed., translated by A. S. Geden (New York, 1966); Arthur Berriedale Keith's The Religion and Philosophy of the Veda and Upanishads, 2 vols. (1925), 2d ed. (Westport, Conn., 1971), pp. 551570; or to Surendranath Dasgupta's A History of Indian Philosophy, vol. 1 (1922; reprint, Cambridge, 1951), pp. 2861.

William K. Mahony (1987)